15. Turbidity removal in swine wastewater Mix the ingredients as follows (ชี้ๆ) Turbidity analysis with a Turbidity Meter and Centrifuged at 150 Revolutions per minute for a period of 2 min, then slowly rotated at 60 Revolutions per minute for 1 min. 2 section Supernatant Turbidity analysis and sediment Flocculating analysis
16. Surface characterization of strains xn11 and xn7 As shown in the table.
17. Effect of initial pH of medium, inoculum volume and culture temperature on flocculating efficiency The table shows that initial pH 5 , inoculum volume 0.3 plus 0.3 and culture temperature 30 degree celsius on the most flocculating efficiency .
18. Figure 1 illustrates the growth, flocculating efficiency and pH variation curves with time. During the initial growth phase, the production of bioflocculant by xn11 + xn7 was almost parallel to the cell growth and a large amount of the bioflocculant was achieved at the stationary phase (3-5 d) with the flocculating efficiency over 96%.
19. Effect of pH and various cations on the flocculating efficiency of xn11 and xn7 The cation could stimulate the flocculation by neutralization and destabilization of residual negative charges of functional groups and by forming bridges which bind kaolin particles to each other . The effect of various cations on the flocculating efficiency of xn11 and xn7.
20. Turbidity removal efficiency of swine wastewater Flocculant and PACl Shows that Flocculant the removing efficiencies of turbidity were 91 % which was better than PACl alone.
21. CONCLUSIONS
. Isolateds xn11 and xn7 had the most effective in sedimentation as (96%).
2. The optimum condition for bacteria xn11 and xn7 is as follows:pH 5, temperature 30 ˚C, Inoculum dose 0.3 ± 0.3 (mL)
3. xn11 and xn7 could maintain effective flocculating efficiency at 30 - 80˚C comparison to other cation Ca^(2+) 〖,Mg〗^(2+) and Al^(3+) and better than PACI
4. xn11 and xn7 had strong decolorizing ability for basic fuchsin with lower ability for reactive black
5. xn11 and xn7 can be removal Cr (VI) 28%